They could face a major conflict together, like a war between kingdoms. This would force them to rely on each other's strengths even more, Flynn's street - smart tactics and Rapunzel's kind heart and ability to connect with people. Their relationship would grow stronger as they fight side by side.
Maybe Rapunzel loses her memory for a while. Flynn would then have to re - introduce himself and help her rediscover their relationship. He could show her all the places they used to go together, tell her stories of their adventures. This process of rediscovery would not only strengthen their bond but also add a new layer of depth to their relationship as Rapunzel might see Flynn in a different light, and Flynn would have to be patient and loving throughout the whole process.
One way to develop their relationship further is by having Aunt May get involved in Spider - Man's scientific side. Maybe she starts to take an interest in his web - shooters or the other gadgets he uses. She could help him improve them, or even come up with new ideas. This would not only bring them closer but also show Aunt May as an intelligent and useful ally in Spider - Man's superhero activities. It would also give her a more active role in his life rather than just being a supportive figure at home.
The relationship can be developed through shared adventures. For example, when they explore a new part of the kingdom together. During these adventures, they can rely on each other's skills. Rapunzel's ability to communicate with people and Varian's scientific knowledge can be combined to solve problems. This would make them respect and trust each other more.
The relationship can be developed by having them face difficult challenges together. For example, in a tough Pokémon battle where they are outnumbered. They have to rely on each other's skills and instincts to win.
Their relationship could be developed through shared challenges. For instance, if they are both tasked with protecting a valuable item from being stolen by a new villain on the Isle. Working together to keep it safe would make them rely on each other more and strengthen their bond.
They could go on adventures together outside of Auradon and the Isle. This would put them in new situations where they have to rely on each other more, deepening their bond.
By showing them relying on each other's strengths more. For instance, Percy's water - related powers could be used in unique ways to protect Annabeth from the hellish fires of Tartarus, while Annabeth's strategic mind could help them navigate the complex and ever - changing landscape.
They could become more like mother and daughter. The Fairy Godmother could teach Cinderella about her family history that she never knew. For example, that her real mother was a powerful magic - user too.
In a 'Rapunzel pregnant fanfiction', Flynn would likely become more responsible. Rapunzel's pregnancy would be a big change for him. He might start to take on more tasks, like building a proper home for them. Their relationship would also have more emotional depth. Rapunzel would rely on Flynn more, and Flynn would feel a stronger sense of duty towards her. They would have to communicate more about their hopes and fears for the baby and their future.
In a fanfiction, their relationship could be developed through shared experiences outside of the lab. They could volunteer together at a local science fair for kids. Seeing Tadashi interact with the kids and his passion for inspiring the next generation would make Honey Lemon admire him even more, and Tadashi would be impressed by Honey Lemon's ability to make complex science fun for the kids.
The kiss could deepen their relationship immediately. It makes them realize their feelings for each other are more intense than they thought.